Drive of drying cylinders of paper machines



July 12, 1927. 1,635,765

P. PRIEM DRIVE OF DRYING CYLINDERS OF PAPER MACHINES Filed July 17 1924 2 Sheets-sheet 1 IN VEN TOR v fizz/$ 1M;

ATTORNEY- 1,635,765 July 12, 1927- P. PRIEM DRIVE OF DRYING CYLINDERS OF PAPER MACHINES Filed July 17 1924 2 Sheets-Sheet 2 INVENTOR A TTOHNEY Patented July 12, 1927.

UNITED STATES- PATENT OFFICE.

PAUL PRIEM, OF HEIDENHE I M-ON-THE-BRENZ, GERMANY, ASSIGNOR TO AMERICAN VOITH CONTACT COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW Yonx.

DRIVE or DRYING CYLINDERS on PAPER icacnmns.

Application filed July 17, 1924, Serial No.'-726,474,1and in Germany September 10, 1928.

This invention relates to a drive of drying cylinders of paper machines, and has for its object to arrange those parts necessary for the drive outside of the paper machine itself on sup orts, standing isolated from the frame of the machine.

Heretofore the means for driving the drying cylinders of. paper machines ave been located on the frame of the machine itself, in consequence whereof the vibrations of the gear are communicated immediately to the cylinders themselves and the bearingsthereof. These vibrations are on the one hand very injurious for the sheet being produced, specially on machines of highest speed; on the other hand, thereby the wear of the gear and of the cylinder bearings is highly increased. These difficulties are met with by the invention which besides this has the further advantage that the drive and its parts,

- specially inthe case of directly coupled electric motors, are out of the influence of the radiation of the heated cylinders.

The invention will be hereinafter described, will-be shown in the accompanying drawings and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical cross view in partial section of one form of the invention, Figure 1s a s milar view of another form of the 1nvent1on,- Figure 3 is a similar view of still another form of the invention; Fig i sa side e'levation of the form. shown in Flg. 3; and, Fig. 5 isa vertical cross v ew of a form of the invention similarto that shown in Fig. 2 wherein each cylinder is provided with driving motors.

Similar characters of references indlcate corresponding parts throughout the various views.

Referring to Figure 1, the drying cylmders A are supported by bearings of the frame B. B and are each driven b a shaft C, w1th which they are connected y a referably flexible coupling 0 The shafts are supported inbearings ti and d of a pedestal 11 standing isolated from the machine frame B Between the bearings d and d the shafts C bear each a spur wheel a, the diameter of the wheels 0 being such as to mesh with each other in a well known manher. One of the wheels 9', on the other s de,

these hearings a rope pulley or the like f meshes with a spur wheel a, which is fixed on a shaft E also supported by bearings of the pedestal l) and carrying 'apulley 6 Referring to Figure 2, the principal arrangement is similar to that shown in Figure 1. On the outer side of the frame B the drying cylinders A bear each a s ur wheel 11 each of which meshes with anot er iipur wheel f fixed on a shaft F. The shafts are supported by the bearings 01 and d of the pedestal D and bear 'eachbetween' The pulleys are of the same diameter and are connected with each other by ropes in such a way, as to give each of the drying cyhnders A a rotary motion of the same speed and alternately reverse direction. The whole group of drying cylinders gets its dnve by a pulley f connected with one of the rope pulleys f.-

The principle of the invention is not altered by the arrangement of another connection between the shafts C or F of the. single cylinders, e. g. by providing helical gear instead of spur wheels. In Fig. 3 the drive is by means'of a worm gear 0 and worm e these are provided with casings c as shown in Fig. 4. 'Each dryer is driven by such a. worm gear drive. The worm shafts rangement may be made an idea of by substituting in Figure 2 each ropewheel f by the armatureof anelectric motor, in combination with a coupling 7", which parts are likewise supported by bearings of the pedesshafts of the single motors may be connected to ether for the purpose of synchronization by a rope, belt, chain or the like drive. Finally, the described arrangement is also applicable to other groups of the paper mac ine, as wet presses, calenders or the like.- i

I have thus described several embodiments of my invention but I do not wish to be lim- 10c ited to the details thereof since Changes may I tel D. Even with this arrangement, the

be made therein without departing from the spirit of the invention as defined in the appended claims.

I claim as new:

1. A drive of drying cylinders of p machines, the essential parts of WhlCl supported by bearln located on a pedestal which stands isola from the frame of the paper machine itself, each of the drying cylinders bein connected with the ad acent part of the drive by means of a flexlble conlin p 2. ln combination with the drying mechanism of a paper machine, said mechanism including su ports, bearin thereon and a plurality o drying cylinders revolubly mounte in said bearin said mechanism being further characterized by absence of driving connections between the cylinders whereby harmful speed variations and vibrations due to driving connections in the mechanism pro r are avoided, su ports isolated from tie supports of said aper are by the last named supports, and means connecting said driving mechanism to the cyl- "-y mechanism and driving mechanism carried inders, whereby the latter are driven by meansexternal to the drying mechanism proper. Y

3. In combination with the drying mechanism of a paper machine, said mechanism including supports, a plurality of cylinders {gnmalled in said supports, said mechanism mg further characterized by absence of drivin where y harmful speed variations and vibrations due to driving connections in the mechanism proper are avoided, driving mechanism su ports isolated from the sup ports of said drying mechanism, a primary driving member carried by said drivlng supports, a plurality of driven members also carried by said driving supports, connections from said rimary driving member to said driven mem ers, and a connection from each of said driven members to one of said drying cylinders, whereby the latter are inde endently driven by means distinct and iso ated from the drying mechanism proper.

In testimony that I claim the foregoing as my invention, I have si ed my name.

AULPRIEM.

connections between the shafts 

